Changes to columns in main table not reflecting in existing Tabular reports

Changes to columns in main table not reflecting in existing Tabular reports

Hi

I created a new table and from that several tabular reports which show only certain columns in each. I have since added an additional column into the main table but this column does not appear for me to select in the existing tabular reports.

Please tell me I don't have to recreate each tabular report... 

Thanks, Claire